The photons from the screen are real.

Everything else is conjecture. If I look back at photos I've taken, I can conjecture that they appear to be an accurate record of what I was seeing when I took them, and that no one has surreptitiously hacked my phone and altered them. If I look at a photo of a grandson posted by my daughter, I can reasonably conjecture that it is also a faithful facsimile of his appearance at that time and place. If I look at a video of a third person posted by my niece, there is zero assurance that it represents reality.

So the default position has to be that the colored dots are for entertainment only, and not to be taken seriously, unless there is some valid reason to believe otherwise.